﻿<!DOCTYPE html>
<html><head><meta charset="UTF-8">
<title></title>

<script>
	"use strict";  //严格模式
	
	
	function  b(x,y,a){
		arguments[2]=10;
		console.log(a);
	}
	//b(1,2,3);
	
	function  c(x,y,a){
		a=10;
		console.log(arguments[2]);
	}
	//c(1,2,3);
	
	
	function  f(x,y,a){
		
		arguments[2]=10;
		console.log(a);
	}
	f(1,2,3);
	
</script>
</head>
<body>
	
</body>
</html>